diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index 6b6eb0f439..3c5e4014b3 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -195,6 +195,7 @@ static int32_t udfSpawnUdfd(SUdfdData *pData) {
   } else {
     fnInfo("udfd is initialized");
   }
+  if(taosFqdnEnvItem) taosMemoryFree(taosFqdnEnvItem);
   return err;
 }